Shoulder joint suture hook capable of preventing suture retreating

Abstract

The invention discloses a shoulder joint suture hook capable of preventing suture retreating, which is characterized by comprising an improved suture hook body and a barb suture system. The invention relates to the technical field of medical instruments, in particular to a shoulder joint suture hook capable of preventing suture retreating, which has the following advantages: 1, the problem that a suture is easy to take out during hook retreating is solved; 2, the problem of inconvenience in threading is solved; 3, the risk of tissue damage is reduced; fourthly, the problem of suture retraction is avoided; 5, the flexibility of the instrument is improved; and 6, the instrument cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a shoulder joint suture hook that prevents thread retreat. Background Art

[0002] In shoulder arthroscopic surgery, especially rotator cuff repair surgery, threading is a crucial step. Currently, this field mainly uses traditional suture hook technology and automatic suture gun technology, but both technologies have obvious drawbacks, as follows:

[0003] (1) Traditional suture hook technology: The operation process of the traditional suture hook technology is: use a straight or curved suture hook to puncture the rotator cuff tissue, build a soft steel wire or PDS line into the suture hook, push out the suture after the puncture is completed, and withdraw the hook. However, this technology has significant shortcomings. When withdrawing the hook, due to the friction between the suture and the tissue and the suture hook, it is very easy to bring the suture out, resulting in failure to pass the line. Once this happens, the doctor needs to perform the puncture operation repeatedly, which not only prolongs the operation time, but also increases the risk of tissue damage. In addition, the PDS line used does not have a loop at the tail end, which is inconvenient to operate during the threading process, further affecting the efficiency of the operation;

[0004] (2) Automatic suturing gun technology: Automatic suturing gun technology uses the rivet tail to automatically penetrate the tissue to achieve thread threading. However, during the withdrawal process, the suture is prone to retraction, and its failure rate is about 10-20%. At the same time, the equipment used in this technology is expensive and has low flexibility during the operation, making it difficult to adapt to complex surgical situations.

[0005] (III) Problem Summary: Existing instruments lack an effective suture anchoring mechanism during hook or gun withdrawal, resulting in a high rate of suture threading failure, low surgical efficiency, increased patient pain, and increased surgical risk. Therefore, a new shoulder suture hook that can address these issues is urgently needed. Summary of the Invention

[0006] In view of this, the embodiments of the present invention hope to provide a new type of lifting auto repair lying plate to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0007] The technical solution of the embodiment of the present invention is achieved as follows:

[0008] A shoulder joint suture hook for preventing thread backing, characterized by comprising an improved suture hook body and a barbed suture system;

[0009] in:

[0010] The improved suture hook body includes a handle, a guide channel is defined in the handle, a thread pushing groove is defined in the middle upper portion of the handle, the end of the handle is connected to the needle body via a thread, the needle body is hollow and communicates with the guide channel, and also includes a high-strength suture, which passes through the guide channel, the thread pushing groove and the needle body in sequence;

[0011] The barbed suture system includes a barbed section and a connecting part. The barbed section includes a loop set at the front end of the suture, a connecting line connected to the loop, and unidirectional movable barbs evenly connected to the connecting line. The unidirectional movable barbs have a spacing of 0.5-1mm, and the barb tips face the distal end. The connecting part includes a second loop, which is connected to the other end of the connecting line and is detachable from the front section. A non-barbed suture is connected behind the second loop, and the other end of the second loop is connected to a smooth suture.

[0012] Preferably, the second ring is separated from the connecting line by shearing, and the ring sleeve and the second ring sleeve are both ring-shaped formed by double lines, which is convenient for the wire grabber to grasp.

[0013] Preferably, the needle body is connected by a thread, and needle bodies with different angles and curvatures can be replaced.

[0014] Preferably, the wire pushing groove of the handle facilitates the thumb to push up the wire passing through the guide channel.

[0015] Preferably, the cross-section of the unidirectional movable barb is triangular, and the vertex angle of the triangle is 30-45 degrees, so as to optimize the anchoring effect on the tissue.

[0016] Preferably, the handle, needle body and inner wall of the guide channel are all mirror-polished, with a surface roughness of Ra≤0.4 μm, which facilitates high-temperature and high-pressure sterilization and reduces bacterial residue.

[0017] Preferably, the surface of the needle body is coated with a medical-grade titanium nitride coating with a thickness of 0.5-1 μm to enhance wear resistance and biocompatibility.

[0018] Preferably, the handle is provided with an anti-slip elastic rubber sleeve, and the Shore hardness of the rubber sleeve is A60-A70, which further improves the grip comfort and stability.

[0019] Preferably, the root of the unidirectional movable barb is provided with an elastic connection structure, and the elastic deformation recovery rate is ≥95%, so that the barb can fit the tissue more closely after passing through the tissue to achieve stable anchoring.

[0020] Preferably, the tip of the needle body adopts a triangular pyramid design with a cone angle of 15-20 degrees and a puncture edge thickness of 0.1-0.15 mm, thereby improving the puncture efficiency of the rotator cuff tissue.

[0021] The embodiment of the present invention adopts the above technical solution, which has the following advantages:

[0022] 1. Solve the problem of suture being easily pulled out when the hook is withdrawn: Traditional suture hooks are prone to pulling out the suture due to friction when the hook is withdrawn. The present invention uses a barbed suture system, in which the unidirectional movable barbs of the barbed section automatically unfold after the suture passes through the tissue, with the barb tip facing the distal end, which can effectively resist reverse tension and automatically anchor the suture to prevent the suture from being pulled out when the hook is withdrawn. It is expected that the suture withdrawal rate will be reduced to <%, and the success rate of single thread passing will be increased by more than %, avoiding repeated punctures.

[0023] Second, it improves the inconvenience of threading: Traditional PDS sutures do not have a loop at the end, making threading inconvenient. The barbed suture system of the present invention has a loop at the front end of the suture and a second loop at the connection. The double loop design facilitates connection with a suture hook or other surgical instruments, greatly improving the convenience of threading and optimizing the surgical operation process.

[0024] 3. Reduce the risk of tissue damage: By reducing repeated puncture operations, the risk of damage to the rotator cuff tissue is effectively reduced and the operation time is shortened. It is estimated that the operation time for each operation can be reduced by about - minutes, reducing the patient's pain.

[0025] 4. Avoid suture retraction: When the automatic suture gun is retracted, the suture is prone to retraction, with a failure rate of approximately 0.0%. The anti-retraction mechanism of the present invention relies on the anchoring effect of the unidirectional movable barbs in the barbed suture system on the tissue, and the design of smooth suture at the connecting part and tail to reduce friction resistance, effectively preventing suture retraction and significantly improving the success rate of thread threading.

[0026] 5. Improved Instrument Flexibility: Automatic suturing guns have limited flexibility and are difficult to adapt to complex surgical situations. The improved suturing hook body of the present invention features a threaded connection between the handle and the needle body, allowing for interchangeable needles with varying angles and curvatures to suit specific surgical needs. This allows for better adaptation to the diverse anatomical structures and surgical scenarios encountered during rotator cuff repair surgery, significantly improving the instrument's flexibility and applicability.

[0027] 6. Reduced device costs: Automated suture guns are expensive, while the present invention has a relatively simple structural design. Through its ingenious barbed suture system and replaceable needle body, it is expected to have a lower manufacturing cost than automated suture guns while maintaining high performance, thus helping to reduce medical costs and improve economic benefits.

[0028] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 It is a structural diagram of the present invention;

[0031] Figure 2 It is a cross-sectional structural diagram of the present invention;

[0032] Figure 3 A cross-sectional structural diagram from another perspective of the present invention;

[0033] Figure 4 This is a cross-sectional structural diagram from a third viewing angle of the present invention.

[0034] Figure numerals: 1. Improved suture hook body; 2. Barbed suture system; 3. Handle; 4. Guide channel; 5. Thread pushing groove; 6. Needle body; 7. Barbed section; 8. Connecting part; 9. Smooth suture; 10. Loop; 11. One-way movable barb; 12. Loop two; 13. High-strength suture; 14. Connecting line; 15. Anti-slip elastic rubber sleeve. DETAILED DESCRIPTION

[0035] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0036] It should be noted that the terms "first," "second," "symmetrical," "array," etc. are used only to distinguish descriptions from positional descriptions and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, limitations on features such as "first" and "symmetrical" may explicitly or implicitly include one or more of these features; similarly, when the number of certain features is not limited in the form of words such as "two" or "three," it should be noted that these features also explicitly or implicitly include one or more of the number of features.

[0037] In the present invention, unless otherwise expressly specified or limited, terms such as "installation," "connection," and "fixation" should be understood broadly; for example, they may refer to fixed connection, detachable connection, or integral molding; they may refer to mechanical connection, direct connection, welding, or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specification and drawings in conjunction with specific circumstances.

[0038] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0039] like Figure 1-4 The present invention provides a shoulder joint suture hook for preventing thread retreat, comprising an improved suture hook body 1 and a barbed suture system 2; wherein: the improved suture hook body 1 comprises a handle 3, a guide channel 4 is provided in the handle 3, a thread pushing groove 5 is provided in the middle upper position of the handle 3, the end of the handle 3 is connected to the needle body 6 through a thread, the needle body 6 is hollow and communicates with the guide channel 4, and further comprises a high-strength suture 13, which passes through the guide channel 4, the thread pushing groove 5 and the needle body 6 in sequence; the barbed suture system 2 comprises a barbed section 7 and a connecting portion 8, The barb section 7 includes a loop 10 provided at the front end of the suture, a connecting line 14 connected to the loop 10, and unidirectional movable barbs 11 evenly connected to the connecting line 14. The unidirectional movable barbs 11 have a spacing of 0.5-1 mm, and the barb tips face the distal end. The connecting portion 8 includes a loop 2 12, which is connected to the other end of the connecting line 14 and is detachable from the front section. A non-barb suture is connected behind the loop 2 12, and the other end of the loop 2 12 is connected to a smooth suture 9. The loop (10) and the loop (12) are both ring-shaped formed by double lines, which are convenient for the thread grabber to grasp.

[0040] In this embodiment, specifically, the ring 2 12 and the connecting line 14 are separated by shearing, and the needle body 6 is connected by a thread, and the needle body with different angles and curvatures can be replaced. The wire pushing groove 5 of the handle 3 facilitates the thumb to push up the wire passing through the guide channel 4.

[0041] In this embodiment, specifically, the cross-section of the unidirectional movable barb 11 is triangular, and the vertex angle of the triangle is 30-45° to optimize the anchoring effect on the tissue. The handle 3, the needle body 6 and the inner wall of the guide channel 4 are all mirror-polished with a surface roughness of Ra≤0.4μm, which is convenient for high-temperature and high-pressure sterilization and reduces bacterial residues. The surface of the needle body 6 is coated with a medical-grade titanium nitride coating with a coating thickness of 0.5-1μm to enhance wear resistance and biocompatibility.

[0042] In this embodiment, specifically, the handle 3 is provided with an anti-slip elastic rubber sleeve 15, and the Shore hardness of the anti-slip elastic rubber sleeve 15 is A60-A70, which further improves the grip comfort and stability. The root of the unidirectional movable barb 11 is provided with an elastic connection structure, and the elastic deformation recovery rate is ≥95%, so that the barb can fit the tissue more closely after passing through the tissue to achieve stable anchoring. The tip of the needle body 6 adopts a triangular pyramid design with a cone angle of 15-20° and a puncture end blade thickness of 0.1-0.15mm, which improves the puncture efficiency of the rotator cuff tissue.

[0043] When the present invention is working:

[0044] Preoperative preparation

[0045] Needle body selection and installation: According to the anatomical characteristics of the surgical site, select a needle body 6 with a suitable bending angle, screw it onto the end of the handle 3 through a thread, and tighten it clockwise to ensure the connection is sealed and stable.

[0046] Suture threading: Insert the ring 10 of the barbed suture system 2 from the front end of the needle body 6, push it along the guide channel 4, and make the ring 10 pass through the thread pushing groove 5, ensuring that the unidirectional movable barb 11 is located outside the needle body 6, and the smooth suture 9 is reserved at the rear end of the handle 3 to complete the suture threading preparation.

[0047] Surgical procedure

[0048] Puncture operation: The doctor holds the handle 3 wrapped with a non-slip elastic rubber sleeve 15, and uses the needle body 6 with a triangular pyramidal tip with a cone angle of 15-20° and a blade thickness of 0.1-0.15mm to accurately puncture the rotator cuff tissue until the barbed section 7 completely enters the tissue.

[0049] Suture anchoring: After puncture is in place, use the thumb to push the high-strength suture 13 upward along the thread-pushing groove 5 to push the unidirectional movable barb 11 out of the needle body 6. The barb automatically opens in the tissue, and the barb tip hooks the tissue fiber to form a firm anchor.

[0050] Hook withdrawal operation: After confirming that the unidirectional movable barb 11 is firmly anchored, slowly withdraw the handle 3. Due to the reverse pulling force of the barb, the high-strength suture 13 will not withdraw with the needle body 6, and the hook withdrawal operation is successfully completed.

[0051] Suture separation: According to the suturing requirements, if the suture length needs to be adjusted or the suturing needs to be completed, use surgical scissors to cut the weak connection section between the loop 2 12 and the connecting line 14, separate the barbed section 7 and the smooth suture 9, retain the barbed section 7 anchored in the tissue, and complete the subsequent suturing operation by pulling the smooth suture 9.

[0052] Postoperative maintenance operations

[0053] Needle replacement: If the puncture angle needs to be adjusted, rotate the needle body 6 counterclockwise, remove it from the handle 3, replace it with a new needle body 6 with a suitable angle, and tighten it again.

[0054] Instrument sterilization: After the operation, the handle 3 and needle body 6 are disassembled. Since the handle 3, needle body 6 and the inner wall of the guide channel 4 are mirror-polished with a surface roughness Ra≤0.4μm and the surface of the needle body 6 is coated with a medical-grade titanium nitride coating with a thickness of 0.5-1μm, they can be directly sterilized at high temperature and high pressure to reduce bacterial residue and ensure the safety of the instrument for the next use.

[0055] In summary, this device has the following significant advantages:

[0056] Improved operational convenience: The ergonomic design of the wire pushing groove 5 and the anti-slip elastic rubber sleeve 15 facilitate the doctor's precise force application and stable grip; the double-wire ring ring 10 and ring two 12 structures simplify the threading process, eliminating the need for additional auxiliary equipment, significantly reducing operational difficulty and shortening surgical preparation time.

[0057] Improve surgical efficiency: The one-way movable barb 11 automatic anchoring mechanism of the barbed suture system 2 increases the success rate of single-time thread passing by more than 40%, avoiding repeated punctures; the replaceable needle body 6 is designed to adapt to different surgical scenarios, reducing time loss caused by instrument adjustments. It is expected that the operation time for each surgery will be shortened by 15-30 minutes.

[0058] Enhanced clinical safety: The anti-retraction mechanism relies on the hooking effect of the barbs on the tissue to reduce the suture withdrawal rate to <5%, reducing the risk of secondary surgery caused by suture dislocation; the triangular pyramid tip of the needle body 6 and the low friction design of the smooth suture 9 reduce the probability of tissue damage and improve surgical safety.

[0059] Expanded adaptability: The threaded connection between the handle 3 and the needle body 6 supports the rapid replacement of needle bodies with different bending angles to adapt to complex anatomical structures; the mirror polishing and titanium nitride coating treatment are compatible with high-temperature and high-pressure sterilization, meeting the needs of different disinfection scenarios and improving the versatility of the instrument.

[0060] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various modifications and substitutions within the technical scope disclosed in the present invention, and such modifications and substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A shoulder joint suture hook for preventing thread withdrawal, characterized in that: It comprises an improved suture hook body (1) and a barbed suture system (2); in: The improved suture hook body (1) comprises a handle (3), a guide channel (4) is provided in the handle (3), a thread pushing groove (5) is provided at the upper middle position of the handle (3), the end of the handle (3) is connected to the needle body (6) through a thread, the needle body (6) is hollow and communicates with the guide channel (4), and further comprises a high-strength suture (13), the high-strength suture (13) passes through the guide channel (4), the thread pushing groove (5) and the needle body (6) in sequence; The barbed suture system (2) comprises a barbed section (7) and a connecting portion (8), wherein the barbed section (7) comprises a loop (10) provided at the front end of the suture, a connecting line (14) connected to the loop (10), and unidirectional movable barbs (11) uniformly connected to the connecting line (14), wherein the unidirectional movable barbs (11) have a spacing of 0.5-1 mm and the barb tips face the distal end, and the connecting portion (8) comprises a second loop (12), wherein the loop (12) is connected to the other end of the connecting line (14) and is detachable from the front section, and a non-barbed suture is connected behind the second loop (12), and the other end of the second loop (12) is connected to a smooth suture (9).

2. The shoulder joint suture hook for preventing thread withdrawal according to claim 1, characterized in that: The second ring (12) and the connecting line (14) are separated by shearing, and the ring sleeve (10) and the ring sleeve (12) are both ring-shaped formed by double lines, which is convenient for the wire grabber to grasp.

3. The shoulder joint suture hook for preventing thread withdrawal according to claim 1, characterized in that: The needle body (6) is connected via a thread, and needle bodies with different angles and curvatures can be replaced.

4. The shoulder joint suture hook for preventing thread withdrawal according to claim 1, characterized in that: The wire pushing groove (5) of the handle (3) facilitates the thumb to push up the wire passing through the guide channel (4).

5. The shoulder joint suture hook for preventing thread withdrawal according to claim 1, characterized in that: The cross section of the unidirectional movable barb (11) is triangular, and the vertex angle of the triangle is 30-45 degrees, so as to optimize the anchoring effect on the tissue.

6. The shoulder joint suture hook for preventing thread withdrawal according to claim 1, characterized in that: The handle (3), the needle body (6) and the inner wall of the guide channel (4) are all mirror-polished, with a surface roughness Ra≤0.4 μm, which facilitates high-temperature and high-pressure sterilization and reduces bacterial residues.

7. The shoulder joint suture hook for preventing thread withdrawal according to claim 1, characterized in that: The surface of the needle body (6) is coated with a medical-grade titanium nitride coating with a thickness of 0.5-1 μm to enhance wear resistance and biocompatibility.

8. The shoulder joint suture hook for preventing thread withdrawal according to claim 1, characterized in that: The handle (3) is provided with an anti-skid elastic rubber sleeve (15), and the Shore hardness of the anti-skid elastic rubber sleeve (15) is A60-A70, which further improves the grip comfort and stability.

9. The shoulder joint suture hook for preventing thread withdrawal according to claim 1, characterized in that: The root of the one-way movable barb (11) is provided with an elastic connection structure, and the elastic deformation recovery rate is ≥95%, so that the barb can fit the tissue more closely after passing through the tissue to achieve stable anchoring.

10. The shoulder joint suture hook for preventing thread withdrawal according to claim 1, characterized in that: The tip of the needle body (6) is designed in a triangular pyramid shape with a cone angle of 15-20 degrees and a puncture edge thickness of 0.1-0.15 mm, thereby improving the puncture efficiency of the rotator cuff tissue.

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